You may have heard of a 'PA' while watching foreign medical TV series. Then you might have thought, "Who is this PA? A doctor? A nurse? Or someone else?" Actually, this is not a common position in our healthcare system in Sri Lanka. However, in countries like America, this Physician Assistant, or PA for short, is someone who plays a very important role in the healthcare system. So, let's find out more about this today?
Simply put, a Physician Assistant (PA) is a highly trained healthcare professional who works alongside and under the supervision of physicians to provide medical care to patients. You can find PAs everywhere from primary care settings to specialist medical fields.
What is the difference between a Physician Assistant (PA) and a Doctor of Medicine (MD)?
It's easy to confuse the two. But there are several key differences between the two. The biggest difference is the amount of time spent on education and training.
Imagine, to become a doctor, you have to study at a four-year medical school, then complete a residency program that lasts from three to seven years, depending on your chosen specialty. After that, some doctors complete another one or three years of specialized training (fellowship).
But to become a PA, you need to earn a master's degree from an accredited PA program after a science-based degree. Both are trained to care for patients. However, a PA usually works under the supervision of a physician .
Let's look at this table to understand this difference a little more clearly.
| Reason for the change | Physician Assistant (PA) | Medical Doctor (MD) |
|---|---|---|
| Education | A Master's degree is required. (Usually a 3-year program) | A medical degree (MD) is required. (4-year medical school) |
| Postgraduate training | There is no mandatory postgraduate training (residency), but clinical rotations are mandatory. | Depending on the field of expertise, a 3-7 year postgraduate training (residency) is mandatory. |
| Role | Diagnoses common medical conditions and provides basic treatment. Always works under the supervision of a physician . | Diagnoses and treats more complex medical conditions. Able to make independent decisions. |
Difference between PA and PA-C
You may have seen a PA's name followed by "PA-C." Does this "C" indicate a specialty? No. It simply means that the PA is certified. After completing a PA education program, they can take the Physician Assistant National Certifying Examination (PANCE). Once they pass that exam, they are allowed to use the "PA-C" designation.
What does a Physician Assistant do?
Just like a doctor, a PA can work in any medical field. They can also specialize in a field like pediatrics or emergency medicine.
The most important thing is that a PA always works in collaboration with a physician and under his or her supervision.
Their main duties include:
- Examining patients.
- Reviewing the patient's medical history and symptoms.
- Developing a treatment plan.
- Prescribing certain medications.
In hospitals
Hospitals are a common place where PAs work. They do a lot of things, such as making patient rounds on wards, updating patient records, taking notes for doctors, and advising patients and their families as they leave the hospital.
During surgeries
There are also PAs who have received special training in surgery. They help identify patients who may need surgery, plan treatment, and create rehabilitation plans after surgery. They can also assist the surgeon during surgery under the supervision of a physician . However, they are not allowed to perform surgery alone.
In Primary Care
In a setting like a regular doctor's office, a PA can do many of the same things a doctor does. For example, examining patients, prescribing medications, stitching up minor wounds, and treating sprains and minor fractures.
Can a PA prescribe medication?
Yes. In many countries, PAs can prescribe non-controlled medications, such as those for blood pressure and cholesterol. They are also allowed to prescribe some controlled medications, which have a higher risk of addiction, under medical supervision. They have the necessary knowledge because they receive special training in pharmacology during their education.
Some areas in which PAs specialize include:
- Anesthesia
- Cardiology
- Dermatology
- Emergency medicine
- Throat, Ear, Nose (ENT)
- Family medicine
- Obstetrics and Gynecology (OB/GYN)
- Pediatrics
- Surgery
The difference between a PA and a Nurse Practitioner (NP)
This is another person who performs a similar role to a PA in foreign healthcare systems. A Nurse Practitioner (NP) is a registered nurse who has received advanced training. Like a PA, an NP can provide basic care to patients and prescribe medications.
The main difference is that PAs study general medicine extensively and then choose a specialty area. NPs choose a specialty area, such as family medicine or pediatrics, when they begin their training.
Another important difference is that a PA always needs a contract or supervision from a physician to work, but in some countries, NPs are legally allowed to operate their own clinics independently.
Take-Home Message
- A Physician Assistant (PA) is not a doctor, but a highly trained and important member of a medical team.
- They always work under the supervision of a doctor.
- A PA's education and training are different from a doctor's. They study up to a master's degree.
- They are well-equipped to treat common, uncomplicated illnesses and injuries.
- Although not common in Sri Lanka, PAs perform a great service in providing healthcare to the public in many countries around the world.


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